Dipper-front.



E. E. VANDERHOEF.

DIPPER FRONT.

} APPLICATION FILED DEC-10,1915. 1 Emmi ed 10% 12,1916.

2 SHEETS-SHEET1.

WWWW

E. E. VANDERHOEF.

DIPPER FRONT.

APPLlCATlON FlLE D DEC. 10, 1915- 2 SHEETSSHEET 2- mmgmmw "WE/WON I runners extending longitudinally of the lElLlEaISON EDWARD VANDERHOEF, 0F RUTH, NEVADA, ASSIGNOR TO AMERICAN MAN- GANESE STEEL COMPANY, OF AUGUSTA, MAINE, A CORPORATION OF MAINE.

DIPPER-FRONT.

Specification of Letters Patent.

Patented Dee. 12, 19th.

To all whom it may concern:

Be it known that I, ELLrsoN EDWARD VAN DERHOEF, a citizen of the United States, and a resident of Ruth, in the county of White Pine and State .of Nevada, have made and invented certain new and useful Improvements in Dipper-Fronts, of which the following is a specification.

This invention relates to dipper fronts, and more particularly to that type or class which are provided with integral .ribs, the upper portions of which provide seats for the reception of reversible dipper teeth.

lltjs among the objects of the presentinvention to cast these ribs upon the outer surface of the dipper front, and thus form dipper front and protecting the same "from undue wear andinjury. The external loca-' tion of these ribs allows the wall of the front.

, to contract or inclineslightly in an inward direction toward its top, providing for the efiicient discharge of theexcavated'material through the bottom of the dipper;

Dippers as heretofore constructed, are provided with ribsextending along the inner surface of the front, and the dipper teeth and bases, in addition vto materially decreasing the capacity of the'dipper, form deep grooves within the dipper, "within which rock and other material become tightly wedged. The protrusion of the p v v p EQI'SPBCUVB of one of the detachable teeth; also requires that it be elevated to; a con- 1 siderable height in order for the excavated material to be dropped into the dipper.

dipper teeth and bases within the dipper,

These objections are overcome in the .present dipper front by. arranging the ribs upon the outside of the dipper front, so that the deep grooves between the ribs or teeth bases occur externallyof the dipper, and'should any of the excavated material become wedged therein, it is forcibly dislodged as the dipper front is moved forcibly through the earth during the next excavating stroke.

vtegral .to be easily and quickly discharged therefrom.

A further object is to provide a dipper tooth point of such construction that the embodiment of the invention may be made withinthe scope of what is claimed without departing from the spirit thereof.

' The. preferred embodiment of my mven tion is disclosed in the accompanyingdrawings, wherein:

. Figure 1' isa view in "front elevation of my improved dipperfrontwembodying the j characteristic features of my invention;

2 is a view in vertical section "takenAonI" I the line 2--2 of Fig. 1; Fig. 3 is aview'in I 'top plan of the dipper front, illustrated in Fig. 1, it being noted that two of'the rile-- tachable dipper teeth are removed in these several figures; Fig. 4. is an enlarged view in vertical section of a dipper tooth and the base upon which it is secured; Fig. 5 is a view in front elevation, and partially in section, of a dipper tooth and the adjoining y parts of a dipperfront, Fig. 6 is a view in ..7 and 8 are fragmental views in front an side section of a slightl modified form of dipper tooth and base, t e modifications residing in the mode of securement of the tooth to the base.

Referring specifically to the several views, the dipper front 10 is formedwith the inront and sidewalls 11 and 12, the lower extremities of which are thickened and reinforced as at 13. Thisfront wall 11, as clearly illustrated in Fig. 2, inclines inwardly toward its upper extremity, which latter is thickened to form the upper lip 14, the extreme edge 15 of which slopes out.- wardly so as to correspond with the adjacent surfaces of the dipper teeth bases, as presently described. Formed integral with the front wall 11, and external thereof, are the ribs 16, the front or outermost edges of which, for the greater part of their length, extend substantially vertical, resulting in the gradual increasing in thickness of the The longitudinal axis of the base is inclined thereon the diverging jaws 19 of the points 20. The rear portions of the bases 17 are provided with ledges 21 against which the extremities of the aws 19 of the points contact, providing a smooth and flush surface between the bases and dipper teeth points.

upwardly and outwardly, as is customary in this class of dipper fronts. The ribs or runners 16, protect thedipper front against undue wear, and being located upon the outer surface of the front wall 11, donot decrease the capacity of the dipper, nor interfere with the admission of the excavated material into the bucket, nor with its discharge therefrom. This latter feature is further enhanced by the smooth interior surface of the front wall and its slight contraction toward its upper extremity. The outward inclination of the lip 15, conforming as it does, to the obliquity of the surfaces of the noses 18, results in a strong integral structure, and aids and facilitates the passage of the excavated material into the dipper. The ribs or runners 16 are preferably beveled along their edges, and are provided with the longitudinally extending and centrally disposed recesses 22, these features lightening the entire structure without in any wise sacrificing the length of the serviceable life thereof.

The lower extremity of the reinforced edge 13 of the dipper front is provided with the integral and spaced lugs 23.- These lugs form a pocket or receptacle in which 1s housed the dipper latch keeper 24, which is accordingly protected from injury thereby, considerable difficulty being heretofore experienced by the breaking of these dipper latch keepers, by the swinging of the bucket forcibly against a car, or the striking of other objects during the use of the dipper.

In order to prevent the jaws of the dipper teeth from spreading, and at the same time to incorporate in the wearing point the least amount of non-wearing metal, I provide the dipper tooth point 20 with the centrallylocated web 25, the same extending between, and formed integral with, the jaws 19, and extending only between the diverging portions of the confronting faces thereof. A second web 26 is formed integral with the rear extremities of the jaws, and is spaced some little distance from the web 25. The front edge 27 of this rear web 26, is provided with the oppositely beveled surfaces 28, arranged for contact with a holding key 29, this latter extending through the diagonally placed and alined openings 30 formed in the sides of the toothed base 17. The nose of above outlined, forms I l the base is bifurcated so as to receive these webs therein, and the key' 29 is forcibly driven through the openings 30 and between the front and rear webs 25 and 28 of the point. The key contacts with the beveled front edge of the rear web and securely locks and holds the point to the base, and without the use of additional holding bolts or rivets. This key 29 may be slightly tapered in its length, so that a wedging action is obtained.

A somewhat modified securement for the point is disclosed in Figs. 7 and 8, wherein the sides of the bifurcated toothed base are provided with the transversely registering a bolt 32 exwhich passes through a notch 33 formed in the rear web 26 of the tooth point. This transverse bolt rigidly secures the point in place, and, in connection with the web which holds the jaws of the point against spreading, and other features, as

an efficient and deopenings 31, through which tends,

sirable dipper tooth.

What I claim is I 1. A dipper front comprising a front wall sloping inwardly toward its upper extremity, ribs carried by said front wall and extending longitudinally along the external surface thereof, said ribs of gradually increasing thickness toward their upper extremity, the thickening of the ribsalong their upper extremity corresponding to the inward slope of the front wall, whereby the front surface of said ribs extends substantially vertical when the dipper front, considered in its entirety, is so positioned.

2. A dipper front comprising a front wall with integral ribs, said ribs provided at their upper extremities with tooth-supporting bases, with the longitudinal axes of said bases inclined upwardly and outwardly, the upper extremity of said front wall thickened and forming a lip inclined to correspond to the inclinatlon of the longitudinal axes of said tooth bases.

3. A dipper front comprising a front wall with integral ribs, said ribs provided at their upper extremities with tooth-supporting bases, with the longitudinal axes of said bases inclined upwardly and outwardly, the upper extremity of said front wall thickened and formin a. lip inclined to correspond to the inclination of the longitudinal axes of said tooth bases, the outmost edge of said lip being bent sharply outward.

4. A single-piece cast metal front for dippers comprising a front wall with integral ribs extending longitudinally thereof, said ribs located upon the outside of said front wall and thickening toward their upper extremities and forming point-supporting bases with wedge-shape noses, said bases provided with overhanging ledges adapted to receive the extremities of the jaws of a 1,208,054 v tilt dipper point thereagainst, and to bring the surfaces of said jaws and the ribs flush, and a thickened lip extending along the top of said dipper front, with the upper edge thereof inclined upwardly and outwardly, corresponding to the obliquity of the noses of.

toward its upper extremity, the uppermost edge of said lip being bent sharply outwardly, said ribs provided with teeth-supporting bases at their upper extremities, adapted to support dipper teeth with the one jaw thereof lying adjacent the inner surface of said dipper front.

6. A dipper tooth base having a bifurcated nose, saidbase'provided with diagonally arranged, and alined, openings, adapted to receive a key therein for the securement of a dipper tooth point thereto.

7. A dipper tooth point comprising a body with rearwardly extending jaws, a' web formed integral with said jaws adj acent their connection with said body, a second web formed integral with, and extending between, said jaws, spaced from the first-mentioned web and located adjacent the rear extremities of said jaws, the front extremity of the second-mentioned web provided with oppositely beveled surfaces.

Signed at Ruth, in the county of White Pine and State of Nevada, this 1st day of Dec, A. D. 1915.

ELLISON EDWARD VANDERHOEF.

Witnesses:

O. B. SPENCE, C. W. HIcKs. 

